Name	Known for
Sian Reese-Williams DCI Cadi John DCI Cadi John See fewer	Hidden (2018)
Sion Alun Davies DS Owen Vaughan (as Siôn Alun Davies) DS Owen Vaughan (as Siôn Alun Davies) See fewer	Hidden (2018)
Sion Ifan Siôn Thomas Siôn Thomas See fewer	Cleddau (2024)
Justin Melluish Glyn Thomas Glyn Thomas See fewer	Hidden (2018)
Rhodri Evan Father McEwan Father McEwan See fewer	Cowbois Ac Injans (2006)
Elen Rhys Hannah Hannah See fewer	The Bastard Executioner (2015)
Lara Catrin Lea Pryce Lea Pryce See fewer	Hidden (2018)
Dritan Kastrati Piotr Korecki Piotr Korecki See fewer	Kraven the Hunter (2024)
Joanna Ignaczewska Katarina Katarina See fewer	The Scopia Effect (2014)
Victoria Pugh DSI Susan Lynn DSI Susan Lynn See fewer	Hidden (2018)
Mali Tudno Jones Rachel West Rachel West See fewer	35 Diwrnod (2014)
William Thomas Dafydd Dafydd See fewer	Torchwood (2006)
Nia Roberts Elin Jones Elin Jones See fewer	Cashback (2006)
Sarah Tempest Alys Mitchell Alys Mitchell See fewer	Hidden (2018)
Gwawr Loader PC Gwawr Daniels PC Gwawr Daniels See fewer	Hidden (2018)
Garmon Rhys PC Ryan Davies PC Ryan Davies See fewer	Hidden (2018)
Oliver Jones Ifan Williams (uncredited) Ifan Williams (uncredited) See fewer	Hidden (2018)